The behavior I described has nothing to do with the metering system of Kobo Readers. It has to do with impact of patches. If I configure a completley plain reader without any patches or tweaks installed, the reader will charge normally - up to 100%.
As soon I have patched it, the charging will not complete and stopp at round about 84%. I have tested this with two Kobo Libra 2.
The result of this observation is, that I will not do any patching anymore.
How it should work
- The battery is charged to 80%
- I connect the reader with USB-C-cable and a charger.
- I can see, the battery is charging
- The sleeve is closed, the reader on StandBy-Mode
- When I open the sleeve later on, I can see it's still charging
- The reader will charge up to 100%
What is with patched devices
- The battery is charged to 80%
- I connect the reader with USB-C-cable and a charger.
- I can see, the battery is charging
- The sleeve is closed, the reader on StandBy-Mode
- When I open the sleeve later on, I can see, it has stopped charging
- The reader will not charge above 84%
This is at least my experience I have made.